Christine Hall, a 66-year-old law librarian from Alexandria, Va., says she lost a lot of weight -- nearly 80 pounds! -- over the course of a few years by subsisting primarily on food from Starbucks. Say what?

The 5-foot, 4-inch Hall told NBC News that she’s gone from 190 to 114 pounds since 2009, when her desire to be a kidney donor inspired her to lose weight — and for the past two years, she’s eaten exclusively at Starbucks, where she says it’s easy for her to keep track of calories.

What exactly has Hall been eating? Oatmeal and black coffee for breakfast, then a “bistro box” — those plastic containers filled with healthy options like hummus and pita, salads and wraps — or panini for lunch and dinner. Hall says she knows exactly how many calories she’s consuming every day, because Starbucks makes it easy to find the nutritional information of all their products. Plus, it’s easy for her to stop in on her way to and from work.

Sarah-Jane Bedwell, a registered dietitian and SELF’s “Eat Like Me” blogger, says that’s she’s a “big Starbucks fan,” but she doesn’t recommend that anyone get all their food from one restaurant. “It limits your ability to consume all the important nutrients your body needs,” she says. “For example, Starbucks doesn’t serve fish and has a limited variety of fruits and veggies.”

Bedwell says she applauds Hall’s efforts to make informed choices by reading nutritional information, but for most people, “this type of diet would be difficult to stick to for the rest of one’s life due to boredom from lack of variety and due to expense!”

That said, Starbucks can certainly be part of your healthy eating plan! Here are Bedwell’s picks for the five healthiest options available at the chain, because they generally provide a good mix of protein and carbs, and they’re higher in fiber and lower in fat (sorry — peppermint mochas with whip are not on this list!):

Keep in mind, though, that one bistro box might not be enough to be considered a complete meal. “Although everyone’s needs are different, I generally would recommend 400-500 calories each for lunch and dinner for an active woman trying to lose weight, plus one or two 100-200 calorie snacks,” Bedwell says. So, Starbucks can be great, and it’s definitely handy to know the exact nutritional value of what you’re eating, but in health as with life, remember that variety is key!